# ATCA Events vs SurfaceOps by uAvionix

The clearest difference is update cadence: SurfaceOps by uAvionix at every 2 weeks against ATCA Events's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ATCA Events ships an update every 7 months, SurfaceOps by uAvionix every 2 weeks. The most recent releases landed on October 25, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | ATCA Events | SurfaceOps by uAvionix |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Size | 72 MB | 5 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Air Traffic Control Association, Inc.](https://appshunter.io/developer/511926096) | [CAVU Consulting LLC](https://appshunter.io/developer/1884389605) |

## What reviewers say

### ATCA Events

[App page](https://appshunter.io/ios/app/atca-events/id6469642578)

**Features:** macOS Compatibility

**In-app purchases:** none


### SurfaceOps by uAvionix

[App page](https://appshunter.io/ios/app/surfaceops-by-uavionix/id6762227397)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ATCA Events free?

ATCA Events is free to download, with no in-app purchases.

### Is SurfaceOps by uAvionix free?

SurfaceOps by uAvionix is free to download, with no in-app purchases.

### Do ATCA Events or SurfaceOps by uAvionix have ads?

Neither ATCA Events nor SurfaceOps by uAvionix shows ads.

### Which is updated more often, ATCA Events or SurfaceOps by uAvionix?

ATCA Events ships an update every 7 months, and SurfaceOps by uAvionix every 2 weeks. Most recently, ATCA Events was updated on October 25, 2026 and SurfaceOps by uAvionix on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*